Overview
The ADT7483AARQZ-RL, produced by onsemi, is a dual-channel temperature sensor and over/under temperature alarm. This device is designed for use in various thermal management systems, including PCs, industrial controllers, and automotive applications. It features three temperature measurement channels: one local and two remote, allowing for precise temperature monitoring of components such as CPUs, GPUs, and discrete diodes. The ADT7483A communicates via a 2-wire SMBus interface and supports multiple SMBus addresses, enhancing its versatility in system integration.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Temperature Measurement Range (Default) | 0°C to 127°C | °C |
| Extended Temperature Measurement Range | −64°C to +191°C | °C |
| Resolution (Remote Channels) | 0.25°C | °C |
| Accuracy (Remote Channels) | ±1°C | °C |
| Accuracy (Local Channel) | ±1°C | °C |
| Supply Voltage (VDD) | 3.0 to 3.6 V | V |
| Average Operating Supply Current | 240 µA (typical) | µA |
| Standby Current | 5 µA (typical) | µA |
| Maximum Junction Temperature | 150 °C | °C |
| Storage Temperature Range | −65 to +150 °C | °C |
| Package Type | 16-lead QSOP |
Key Features
- 1 Local and 2 Remote Temperature Sensors
- 0.25°C Resolution/1°C Accuracy on Remote Channels
- 1°C Resolution/1°C Accuracy on Local Channel
- Extended, Switchable Temperature Measurement Range (0°C to 127°C or −64°C to +191°C)
- 2-wire SMBus Serial Interface with SMBus Alert Support
- Programmable Over/Under Temperature Limits
- Offset Registers for System Calibration
- Up to 2 Overtemperature Fail-safe THERM Outputs
- Small 16-lead QSOP Package
- 240 µA Operating Current, 5 µA Standby Current
- Pb-Free, Halogen Free, and RoHS Compliant
Applications
- Desktop and Notebook Computers
- Industrial Controllers
- Smart Batteries
- Automotive
- Embedded Systems
- Burn-in Applications
- Instrumentation
Q & A
- What is the default temperature measurement range of the ADT7483A?
The default temperature measurement range is 0°C to 127°C.
- Can the temperature measurement range be extended?
Yes, the range can be extended to −64°C to +191°C by setting or clearing Bit 2 in the Configuration 1 register.
- How many temperature measurement channels does the ADT7483A have?
The ADT7483A has one local and two remote temperature measurement channels.
- What is the resolution of the remote temperature channels?
The resolution of the remote temperature channels is 0.25°C.
- What interface does the ADT7483A use for communication?
The ADT7483A communicates over a 2-wire SMBus interface.
- Can the ALERT output be reconfigured?
Yes, the ALERT output can be reconfigured as a second THERM output.
- What is the typical operating current of the ADT7483A?
The typical operating current is 240 µA.
- Is the ADT7483A RoHS compliant?
Yes, the ADT7483A is Pb-Free, Halogen Free, and RoHS Compliant.
- What are the common applications of the ADT7483A?
Common applications include desktop and notebook computers, industrial controllers, smart batteries, automotive systems, and embedded systems.
- How is the temperature data formatted in extended mode?
In extended mode, the temperature data format is offset binary, with values offset by +64.
